Stove or furnace



{No Model.) i

W. W. ROSSMAN.

STOVE 0R FURNACE.

No. 601,590. Patented Mar. 29, 1898.

7? H (we? in 1 l E 1 j y-Z. in E l m n I S S r-Tail I V i Q I 4 LINVENTOH kw; BY 31 216.79%

UNITED STATES PATENT FFIGE.

IVIIJLIAM W. ROSSMAN, OF DETROIT, MINNESOTA.

STOVE OR FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 601,590, dated. March29, 1898.

I Application filed August 10, 1897. Serial No. 647,722. (No model.)

.To ctZZ whom it may concern.-

Be it known that I, WILLIAM W. RossMAN, a citizen of the United States,residing at Detroit, in the county of Becker and State of Minnesota,have invented certain new and useful Improvements in Stoves or Furnaces;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates to improvements in stoves and furnaces, and hasparticular reference to that class of stoves and furnaces that are usedto heat the room or space in which they are located, and has for-itsobject the provision of an increased air-heating surface for the purposeof bringing into contact with the heat of the stove or furnace thegreatest possible amount of air.

The invention consists, essentially, of a number of tubes or pipesarranged inside of the fire-box and smoke-chambers of the stove orfurnace, along the sides thereof, and extend from the bottom of thestove up through the fire-box and smoke-chambers and through the top ofthe stove and are adapted to take air from the bottom, heat it, andthrow it out at the top.

The invention further consists in the novel construction and arrangementof the several parts of the device, as hereinafter described,illustrated in the drawings, and more particularly pointed out in theclaims hereunto appended.

In the drawings, Figure l is a perspective view of a stove having myimprovement applied thereto and having a port-ionof the casing of saidstove broken away to show the tubing in the fire-box and smoke-chambers.Fig. 2 is a longitudinal sectional view of Fig. 1. Fig. 3 is a rear endsectional view of the device, showing the arrangement of the tubes. Fig.4 shows different forms of pipes or tubes that I use in stoves for thepurpose of increasing the air-heating surface.

Referring to the drawings by letter, A represents the body of the stoveor furnace, and A the legs or supports therefor, as shown.

removed, and A is the main fuel-door to the fire-box.

The upper part of the stove or furnace is divided into two or more smokechambers or passages R and S, made by the partitions or plates, R and S,as shown. The entrance to the chamber S is at the rear end of the stove,the smoke and flame passing thereinto from the fire-box, and theentrance into the smokechamber It being at the front part of the stove,the flame and smoke passing from the chamber S into the chamber R, fromwhence it is conducted through the outletflue or chimney.

S is a doorin the front part of the stove or furnace leading into thechamber S and is for the purpose of removing soot and ashes therefrom,and R is a door in the rear of the stove and leads into the chamber Rand is for the purpose of cleaning said chamber. The passages betweenthe fire-box and chamber S and between chamber S and chamber R areafforded by reason of the plates S and R being shorter than the interiorof the stove. Instead of these plates being short, as described, theymay be-the full length of the interior of the stove and provided withsuitable openings, as is evident.

O O C O are a number of tubes extending through said stove or furnacefrom the bottom to the top thereof, passing through the fire-box and thetwo or more smoke-chambers S and R, as is evident. The lower ends ofthese tubes or pipes extend a short distance below the bottom of thestove and are slightly flared, as shown at C, to induce a freer passageof the air thereinto, as is evident. The upper ends of these tubes maybe flush with the top of the heater or stove or they may project aslight distance above, as desired. The tubes 0 G C 0 instead of beingthe same size in the smoke-chambers as in the fire-box are larger, asshown at 0 By enlarging the tubes or conduits in the chambers R and S agreater amount of heating-surface for heating the air in its passagethrough said tubes or conduits is obtained, and the enlargement of thetubes or conduits also serves to greatly diminish the space for thepassage of the products of combustion through said chambers, so that thepassage of said products will be necessarily slow or retarded, whereby amore complete mingling, and therefore combustion, of the escaping gaseswill be had, and thus the air in its passage through the tubes orconduits will be delivered into the room in a more highly-heatedcondition. It will be observed that the outlets of the tubes or conduitsare somewhat contracted, which admits of a more rapid flow of air intothe room and its circulation therein.

The fire having been started in the fire-box, the tubes 0 O therein willbecome heated and the contained air will rise and flow from the upperends of the tubes, thus drawing into the lower ends cool air, which inturn is heated and thrown out into the room of space. By reason of thetubes passing through the smoke-chambers the heat therein will bepartially absorbed and thrown out into the room instead of escapingthrough the chimney. Instead of the enlargement of the tubes 0 I mayhavethe enlargements C 0 one in each smoke-chamber, as is evident.

Having thus described my invention, what I claim is- 1. In a stove orheater of the character described, the combination with the fire-box andthe chambers S and R, of air tubes or conduits leading from the outside,near the bottom of the stove or heater, and passing up f and R andhaving contracted outlets,whereby the cold air taken in at or near thebottom of the stove is delivered into the room rapidly and in ahighly-heated condition, as set forth. In testimony whereof I affix mysignature in presence of two witnesses.

WILLIAM XV. ROSSMAN.

\Vitnesses:

A. W. BLANDING, C. D. HOLMES.

